Jar-sealing device.



J. L. ROLLINS. JAB SEALING DEVICE. APPLICATION nun IA]. 24,1910.

973,214. Patented Oct. 18,1910.

J'ARROT L. ROLLINS, 0F COLFAX, CALIFORNIA.

J Alt-SEALING DEVICE.

Specification of Letters Patent.

Patented Oct. 18, 1910.

Application filed January 24, 1910. Serial No. 539,732.

To all whom it may concern;

Be it known that I, J ARBOT L. RoLLiNs, a

. citizen of the United States, residing at Colfax, in the county of Placer and-State of California, have invented new and useful Improvements in Jar-Sealing Devices, of which the following is a specification.

My invention relates to a. device for hermeticall sealing jars such as are specially designe to contain hermetically sealed goods. v It consists in a novel combination of sealing elements, arrangement of parts connected therewith, and in details of construction which will be more fully explained by reference to the accompanying drawings, in whicht Figure 1 is a sectional elevation of the upper part'of a jar, illustrating my invention. Fi 2 is a partial perspective view of the sealing ring. Fig. 3'is an enlarged section through w-Pw of Fig. 2. v Fig. 4 isa plan View. 1

It is the object of my resent invention to provide an improved an oomparativel inexpensive device for sealing jars an the construction of a jar and cover to be used in conjunction therewith so that the jar may be closed and sealed without direct contact of the sealing medium with the interior lip and connected channel of the jar, and to so construct the seal as to provide superposed layers of material havin a successively less, resistance to heat from t e bottom upward; the whole device serving to provide a very perfect seal, and which is im ortant in the opening of jars to substantial y prevent any of the scaling medium remaining in the channel of the in such a manneut-hat'it' is liable to become mixed with the contents of the jar when the latter are poured out.

The jar A has an upturned flange 2 pro jecting near the top and having its up or edge substantially level with the upper e go A of the jar. Between these two edges is a channel so formed that the deepest portion 3 surrounds the lip A, the outer wall of this lip being divergent downward as shown, and capable of receiving with an approximate fit, the down-turned lip at of the cover 4* so that when the cover is placed upon the jar, the inner periphery of the lip 4 will form an approximate fit to the inclined outer surface of the jar lip A. The edge of the lip 4: reaches the bottom of the inner portion 3 of the channel around the jar, and this channel is of such width that there is also a space, as plainly shown, around the exterior of the lower. edge of the cover. This space is practically intended to be clear of all packing material, and its object is to provide a-clean channel into which none of the sealing medium is allowed to ass.

Exterior to the channel 3 is the upper connected portion 3 which extends to the top of the flange 2, and has its inner surface convergent downwardly from the top. This, in con unction with the outwardly divergent lip 4 of the cover, provides a channel which is convergent in cross section.

The sealing medium consists of a plurality of layers of material, the lower one of which, 5,'is of a suiiiciently heat-resisting character so .that it will not soften at the temperature to which the contents of the jar will be submitted, say 212 F. Various materials may be used for this purpose. I prefer to use a substance which is not compressible, but which can be made to substantially fit the lower part of the channel above described. This lowermost ring has a reinforcing wire 6 partly enveloped in it when the ring is formed, and secured to the ring this wire 7 serving to strengthen the ring and prevent breakage or damage by careless handling. It also serves to break the seal. Above this rin 1s a second ring 7. This second ring is ma eof a material less heat-resistant than the lowermost ring, but which may soften somewhat but not melt at'the temperature to which the jar contents are subjected. This ring may also have a reinforcing wire or cord concealed within it.

The uppermost ring 8 is made of-wax or equivalent material which is of such a character that the heat of the jar contents will melt and soften it sufficiently so that it will flow into any interstices between itself and the Walls of the channel in which it lies. Thus the lowermost ring forms an impervious packino which keeps the' bottom of the groove or channel perfectly clean. The second ring is sufliciently subject to the heat to cause it to adhere, and .to expand enough to form a tight joint with the top of the lower most ring, and thusprevent any accidental passage of the softer material of the uppermost ring.

In case of any defect in the joints or form .of the two lower rings, the uppermost ring,

as before stated, will soften sufiicieptly to fill any grooves or interstices, and to make a of the groove or channel, and the latter left rior inclined surface of the cl1annel, a sealing have vertical posit-ion,

jar closure, of a downwardly convergent channel around its periphery, a cover having a downwardly turned flange fitting the interior of the channel, a closure consisting of a downwardly convergent ring, said ring being formed of successive layers of material, the lowermost of which forms a heat-resistant joint with the lower part of the channel, and the uppermost being capable of softening by the heat of the jar con tents so as to hermetically close the upper part of the channel, said lower sections having wires extending through them.

i. The combination with a jar having an annular downwardly convergent channel surrounding its top, and a cap having a tight joint with the wall of the jar channel. l 3. v The combination in a Tie sealing is thus absolutely complete. f jar having an annular The wire 6 upon the lowermost ring may one end brought out, and provided i with a loop or ring 6 which may normally f lie across the top of the jar within' easy} reach so that by pulling upon this wire the i whole of the united rings will be lifted out perfectly clean. l The jar cover will not fit so closely upon I the mouth of the jar as to prevent the ingress l of air, and thus the breaking of the seal to I allow the cover to be removed. An important construction of the jar cover I is the formation of the central portion 4L in l a" smooth convexity toward the interior of the jar. This causes any air which may be contained in the jar contents, and which will be expelled by the cooking with the jar in a to pass to the outer periphery of the jar cover, and thus escape I over the edge. of the jar, and no air will be retained in the jar as m' y occur in the case l of irregular corrugated or concaved-jar caps. form a oint between the sides'of the chan- Havmg'thus described my invention, what i nel, and the lower sections of therlng. I claim and desire to secure by Letters Pat= 5. A ar having an annular downwardly surface of said channel, of a sealing ring, said ring being composed of. superposed sections, the lowermost of which is heat-resistant, and has an annular reinforcing wire and the uppermost section being capable oi softening by the heat of the jar contents to cut is' convergent channel around the 'top, the

l. Aj ar having an exterior annular groove '111I161 P 11 0f sald around the top, and trapezoidal in cross.sec I greater p h an e Ou er portion, and & tion, a cap or cover having a downwardly step or shoulder between the two, a cap havturned flange substantially fitting the inte- 11 dqwnwardly turned flange extendlng s'u stantlally to the bottom of the medium consisting of a plurality of layers 131011 of the (Illa-111161, 11 Sealing mediulgi coir sec lOIl o of material,.the uppermost of said layers g 0f 8 1in"' pered in Cross being apable f s fte i b h t f th ht the surrounc lng annular channel, 831d ringbeing composed of a plurality of layers, the lowermost of which is heat resistant and capable of seating upon the shoulder of the channel, and the uppermost rings fillin the upper part of the channel and'capable jar contents, andthe lower ones having successively increasing heat resistingqualities. 2. The combination in a jar closure, of a jar having an annular upwardly divergent channel around the periphery, a cap having an inwardly convex interior surface, and ai downwardly turned flange substantially fitl 1 h ting the interior of the channel, and forming In testlmony Whereot I have her 91mm Set with the exterior a downwardly'convergent y hand In the presence of O su scrlb ng channel, a sealing medium consisting of Wltnessessuper osed layers ofmaterial formed into a JARROT L. ROLLIN S. ring fitting said channel, and having suc- Witnesses:

. S. K. WILLIAMS,

cessively greater heat-resisting qualities] B. .J. GHENT.

from the upper to the lower one.

inner porof softening by heat to form a hermetical downwardly turned flange fitting the inner channel having a 

